The HAB groups of greatest concern to California are Pseudo-nitzschia and Alexandrium, since some species can produce potent algal toxins that can be transferred through the food web to higher organisms such as marine mammals and humans.

Water samples and net tows are collected once per week to monitor for HAB species, and naturally occurring algal toxins, as well as water temperature, salinity, and nutrients.

Objectives:

The goals of this program are to collect comparable data
at five regional stations, provide timely updates on HAB events,
and aid in understanding the timing, extent, and impact of these
events on humans as well as the ecosystem.

More Info:

One Health Harmful Algal
Bloom System (OHHABS) collects data
on harmful algal blooms and associated human and animal illness.
OHHABS provides information about harmful algal blooms and
associated illnesses for the general public, including ways that people
can protect themselves, their families and their pets.